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Effects of Rebar Temperature and Water to Cement Ratio on Rebar-Concrete Bond Strength of Concrete Containing Fly Ash

Description: This research presents the results on an experimental investigation to identify the effects of rebar temperature, fly ash and water to cement ratio on concrete porosity in continuously reinforced concrete pavements (CRCP). Samples were cast and analyzed using pullout tests. Water to cement ratio (w/c) and rebar temperature had a significant influence on the rebar-concrete bond strength. The 28-day shear strength measurements showed an increase in rebar-concrete bond strength as the water to cement ratio (w/c) was reduced from 0.50 to 0.40 for both fly ash containing and non fly ash control samples. There was a reduction in the peak pullout load as the rebar surface temperature increased from 77o F to 150o F for the cast samples. A heated rebar experiment was performed simulating a rebar exposed to hot summer days and the rebar cooling curves were plotted for the rebar temperatures of 180o F - 120o F. Fourier transform infrared spectroscopy was performed to show the moisture content of cement samples at the rebar-concrete interface. Mercury intrusion porosimetry test results on one batch of samples were used for pore size distribution analysis. An in-depth analysis of the morphological characteristics of the rebar-concrete interface and the observation of pores using the scanning electron microscope (SEM) was done.
Date: May 2010
Creator: Pati, Ardeep Ranjan
Partner: UNT Libraries

Effects of Suspended Multi-Walled Carbon Nanotubes on Daphnid Growth and Reproduction

Description: Multi-walled carbon nanotube aggregates can be suspended in the aqueous phase by natural organic matter. These aggregates are ingested by filter feeding zooplankton. Ingested aggregates result in decreased growth and decreased reproduction. These effects may be caused by reduction in energy input from normal feeding behavior. pH alters natural organic matter structure through changes in electrostatic repulsion. Altered natural organic matter structure changes multi-walled carbon nanotube aggregate size. This size variation with variation in pH is significant, but not large enough a change in size to alter toxicity, as the aggregate size range remains well within the particle size selection of the organisms.
Date: May 2010
Creator: Alloy, Matthew Michael
Partner: UNT Libraries

Effects of Tasks on Information-Seeking Behavior in a Police Work Environment in the Context of Criminal Intelligence

Description: Although dominant effects of tasks on individuals' information-seeking behavior is accepted by many scholars, a limited number of studies has been conducted to reveal the nature of the relationship between tasks and information-seeking behavior. In their studies, some earlier researchers categorized tasks according to their complexity while others did the same according to the specifications of tasks. Two of the groundbreaking researchers in this area are Katriina Byström and Kalervo Järvelin who contributed to the understanding of the relationship between task complexity and information-seeking behavior. However, their findings also need empirical support for theory growth. In response to this need, this study attempts to test Byström and Järvelin's findings through a research using different research methods and applied in a police work environment. Other than providing empirical support for theory growth, this research is also expected to contribute to the understudied area of police information-seeking behavior. Both qualitative and quantitative data were collected from the participants who came from traffic, homicide, and anti-terrorism divisions of Ankara, Eskisehir, and Kirikkale Police Departments in Turkey. The participants identified terrorism cases as the most complex cases to solve, followed by homicide and traffic accident cases. Differences in the information-seeking behavior of three groups of police officers were examined through qualitative and quantitative data analysis. Oneway ANOVA technique and post hoc comparisons were used to analyze the quantitative data. In addition to shedding light on information-seeking behavior of police officers investigating related cases in Turkey, the results provided support for Byström and Järvelin's findings. For instance, the officers investigating more complex tasks used significantly more information sources than the others, while the use of external information sources was significantly higher in more complex cases.
Date: May 2010
Creator: Tatil, Serkan
Partner: UNT Libraries

L'emploi variable des signes diacritiques dans le français tchaté : une étude variationniste en temps apparent .

Description: After providing an historical overview of the French spelling system and orthographic variation, this study analyzes selected internal (i.e., linguistic) factors and one external (i.e., social) factor that can influence the use of diacritics in online French-language chat sessions. From a corpus of synchronous computer-mediated communication, 3,855 tokens of graphemes capable of bearing diacritics were coded with the following scheme: Letter, Diacritic, Grapheme (i.e., Letter and Diacritic combined), Date of Participation, and Age Group of Participant. A multivariate (VARBRUL) analysis determined that Grapheme exerts the most influence on variation.
Date: May 2010
Creator: Al-Rashdan, Omar
Partner: UNT Libraries

The Enameling Arts in Kuwaiti Pre-service Art Teacher Education

Description: The purpose of this study was twofold: (1) to examine the knowledge, skills, and experiences in the enameling arts and the attitudes and perceptions of in-service (n = 12) and pre-service Kuwaiti art teachers (n = 170), art supervisors at the Ministry of Education (MOE) (n = 3) and art education faculty members at the College of Basic Education (CBE) and Kuwait University (KU) (n = 8) about what they believed pre-service art teachers should know and be able to do in order to teach the enameling arts, and (2) to use this information to inform and guide the development of a content outline for an enameling course for pre-service Kuwaiti art teachers that is educationally (how to perform enameling arts skills and how to teach what they know), practically (safety issues, workshop management, etc), and culturally (its relation to Islamic culture) suitable. Both quantitative and qualitative approaches were used. Most of the respondents revealed limited knowledge and skills and modest experiences in the enameling arts. All interviewees in the study expressed positive perceptions and attitudes about the enameling arts. Most agreed that a revision to the current art education curriculum at the CBE was needed and made suggestions about how the curriculum should be revised. It was clear that there is a disconnection and miscommunication between the MOE and the CBE with regards to the information about enameling that should be covered and taught in the art education classes. All respondents expressed support for the inclusion of a course in enameling in the art education curriculum at the CBE. Because of the limited knowledge of the participants in the study, they were not able to provide guidance in shaping the content for a course in the enameling arts. The researcher had to rely on the literature review and his ...
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Date: May 2010
Creator: Darweesh, Ali Hussain
Partner: UNT Libraries

Evaluating the Effectiveness of a Comprehensive Staff Training Package for Behavioral Interventions for Children with Autism

Description: The effectiveness of behavioral interventions for the treatment of young children with autism has been well documented in professional literature. The success of these procedures, however, depends on the fidelity of implementation and proper training of the therapist. The purpose of this study was to evaluate a 125-skill, comprehensive staff training package that involved a graduated sequence of teaching. In addition to changes in skills, social validity and training time were also assessed. Results indicate that correct demonstration of skills increased following training, incorrect implementation decreased, teachers rated the procedures favorably, and the total training took between 20 and 32.5 hours for over 120 skills to reach mastery criteria. A discussion of the results as well as implications for future research is also provided.
Date: May 2010
Creator: Weinkauf, Sara Marie
Partner: UNT Libraries

Evaluation of the Easter Seals North Texas Autism Treatment Program: Progress in Meeting Program Mission

Description: Applied behavior analysis (ABA) remains at the forefront of effective interventions for children with autism. In some cases, the high cost of treatment and other environmental factors limit families from accessing services. The Easter Seals North Texas (ESNT) Autism Treatment Program (ATP) was created to reach high risk, underserved families in the North Texas area by providing early intensive behavioral intervention (EIBI) services to children with autism. This evaluation was conducted to analyze the success of meeting the ESNT ATP program mission to provide culturally responsive ABA to children. The evaluation includes the design of assessments, the analysis of the assessment data, and a set of recommendations to maintain and increase program accessibility.
Date: May 2010
Creator: Pritchett, Malika Naomi
Partner: UNT Libraries

Examining the Origins of Sociology: Continuities and Divergences Between Ibn Khaldun, Giambattista Vico, August Comte, Ludwig Gumplowicz, and Emile Durkheim

Description: This thesis examines the extent to which Ibn Khaldun can legitimately be considered a founding father of sociology. To pursue this research, Khaldun's theoretical framework will be compared with four Western scholars: Auguste Comte, Emile Durkheim, Giambattista Vico, and Ludwig Gumplowicz. This paper begins with an Introduction (Chapter I), followed by a general overview of Khaldun's work (Chapter II). Next, Khaldun's work is compared to that of Auguste Comte (Chapter III), Emile Durkheim (Chapter IV), Ludwig Gumplowicz (Chapter V) and Giambattista Vico (Chapter VI). In each of these chapters, Khaldun is compared and contrasted to the other social theorist, illustrating their similarities and considering their differences. Finally, in Chapter VII, I put forth conclusions that consider the extent to which Khaldun can validly be considered a founding father of sociology.
Date: May 2010
Creator: Soyer, Mehmet
Partner: UNT Libraries

Excerpts From the Eva Crane Field Diary: Stories

Description: Male or female, young or old, the characters of this collection inhabit a liminal space of trauma and social dislocation in which elements of the real and fabulous coexist in equal measure. The ghosts that populate the stories are as much the ghosts of the living, as they are the ghosts of the dead. They represent individual conscience and an inescapable connection to the past.
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Date: May 2010
Creator: Jacobs, Emily
Partner: UNT Libraries

An Experimental Study on Situated and Dynamic Learning Assessment (SDLA) Environment

Description: The current supplementary web based English learning in Taiwan provides online learning resources and gives assessments at the end of each lesson to evaluate learners' online learning results. Based on the testing results, instructors may adjust their in-class instructional method to focus on the students' weaknesses. For the average classroom size of 40 students with one instructor, it is extremely difficult to provide individual learning content for each learner's needs because each student has his or her own weaknesses. This study conducted the situated environment with Vygotsky's dynamic assessment theory to test learner's learning achievements and satisfactions as compared to the current web learning environment. The study finds that when both groups of Taiwanese students used Internet based learning, those that utilized the situated and dynamic learning assessment environment showed a statistically significant higher achievement score than those using only the current online learning environment (p < .01). In addition, learners in the SDLA environment had statistically significant higher satisfaction scores than those in the current web learning environment.
Date: May 2010
Creator: Lee, Zeng-Han
Partner: UNT Libraries

An Exploration of the Relationship Between Principal Leadership Efficacy, Principal Computer Self-Efficacy, and Student Achievement

Description: The purpose of this study was to examine whether or not relationships exist between principals' technology proficiency and student achievement as indicated by 2008 Texas Assessment of Knowledge and Skills (TAKS) ninth grade reading scaled scores. Secondly, the study examined whether or not relationships exist between principals' leadership self efficacy and student achievement as indicated in the 2008 Texas Assessment of Knowledge and Skills (TAKS) ninth grade reading scaled scores. Lastly, the select principal's personal and school demographic variables (principal gender, total years of experience as a professional, total years as principal at current school, total years of principal experience, highest degree earned, school economic status, school size) were considered within the study. The survey instruments used in this study were the Technology Proficiency Self Assessment Scale (TPSA) developed by Ropp in 2000 and the Principal's Self-Efficacy Scale (PSES) developed by Tschannen-Moran and Garies in 2004. A total of 129 Texas principal's participated in the study. Multiple regressions were utilized and effect size was considered to determine the strength of the relationship between variables. A statistical significance was found relating to the school's social economic status only when using both the PSES and the TPSA instruments. The effect sizes reported were all moderate, which acknowledged that relationships did exist between all predictor variables tested. Based on the information provided for B weights, School's SES was found to be the best predictor of reading TAKS achievement, preceded by Principal's Highest Degree Earned and Gender. SPSS 16.0 was used to analyze all data. This study adds to the literature on principals' technology efficacy and principal's self efficacy.
Date: May 2010
Creator: Brown, Shelia
Partner: UNT Libraries

Fathom's Edge

Description: Investigating elements of the creative process in the work of three poets: James Wright, Gjertrud Schnackenberg, and Pegeen Kelly. Each poet deploys a different method for access to those experiences that lie at the edge of accessible language. Each method is discussed and its deployment illustrated. Wright leads us from the sensory world to the supersensual. Schnackenberg makes use of the formal device of the fairy tale. Kelly immerses in the logic of dreams. Drawing on Elaine Scarry's theory of the imagination, the case is made that the poetic act is a dialectic between the poet and the sensory world, in which perception and imagination are equally important.
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Date: May 2010
Creator: Sweeney, Mark
Partner: UNT Libraries

Fractus I for Trumpet in C and Electronic Sound: A Critical Examination of the Compositional Process

Description: Fractus I is a composition for trumpet in C and live electronic sound. The electronics were primarily created using SuperCollider, an environment and programming language for real time audio synthesis. This project investigates SuperCollider's pattern and task functionality as a means of supporting and enriching the compositional process. Fractus I develops several different code architectures in order to randomize as well as synchronize various musical elements. The piece exploits SuperCollider as both an audio synthesis tool and a performance conduit. Additionally, the nature of SuperCollider's patterns and tasks influences the form and content of the composition. The project underscores SuperCollider as a powerful, versatile and open-ended tool for musical composition and examines future directions and improvements.
Date: May 2010
Creator: Fieldsteel, Eli Mulvey
Partner: UNT Libraries

Geographic Distance, Contact, and Family Perceptions of Quality Nursing Home Care

Description: The effect of frequency of nursing home contact on family perceptions of quality care is the focus of this research. A family member characteristic, such as geographic distance from the nursing home, affects his or her frequency of contact with the nursing home. Frequency of contact, in turn, affects family perceptions of the care his or her loved one receives in the nursing home. The theoretical framework for this study is based on Allport's intergroup contact theory, which posits that when four contact conditions - institutional support, equal status, common goals, and intergroup cooperation - are present in an intergroup situation, a reduction in anxiety between groups is likely to occur. Regression analysis tested the stated hypotheses using survey data collected from 275 family members of residents in 10 Dallas-Ft. Worth area nursing homes. This study is among the first to quantify family geographic distance, finding that family geographic distance is a significant negative predictor of nursing home contact. Additionally, results build on Allport's theory by extending its' usefulness to nursing home organizations in two distinct ways. First, findings support Allport's premise that contact alone between groups - i.e., family members and nursing home staff - is insufficient for increasing or decreasing family perceptions of nursing home care. Second, three of the four contact conditions included in Allport's theory were statistically supported by the data. In sum, findings of this research provide nursing homes with an empirically tested model for improving family perceptions of quality nursing home care.
Date: May 2010
Creator: Dillman, Jennifer L
Partner: UNT Libraries

Hand Amputees have an Altered Perception of Images at Arm's Length

Description: The preface to this collection "Dust Clouding: Ambiguity and the Poetic Image," highlights the ways in which poets such as W.S Merwin and Donald Revell use ambiguity and the poetic image to strengthen their poems and encourage equality between reader and writer. Hand Amputees have an Altered Perception of Images at Arm's Length is a collection of poems and poem like adventures.
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Date: May 2010
Creator: Irizarry, Justin Lee
Partner: UNT Libraries

"He's a Human, You're a Mermaid": Narrative Performance in Disney's The Little Mermaid

Description: Disney animation represents a powerful source of economic and cultural production. However, following the death of Walt Disney, the animation division found itself struggling to survive. It was not until the 1989 release of the hugely successful animated film The Little Mermaid that Disney would reclaim its domination among children's cultural producers. Additionally, The Little Mermaid inaugurated a shift in Disney's portrayals of gender as the company replaced the docile passive princess characteristic of its previous animated films with a physically active and strong willed ambitious heroine. Grounded in an understanding of Disney's cultural significance as dominant storyteller, the present study explores gender in The Little Mermaid by means of narrative performativity. Specifically, I analyze the film's songs "Part of Your World," "Under the Sea," and "Poor Unfortunate Souls" as metonymic narrative performances of gender that are (1) embodied, (2) materially situated, (3) discursively embedded and (4) capable of legitimating and critiquing existing power relations.
Date: May 2010
Creator: Polanco, Raquel
Partner: UNT Libraries

An Historical Analysis of Rule and Policy Changes in the Texas University Interscholastic League One-Act Play Contest, 1986-2006, and the Results of Those Changes: Administrator and Teacher Perceptions

Description: The University Interscholastic League (UIL) One-Act Play Contest is a competition where similarly sized Texas schools present an 18-40 minute play usually adjudicated by a single judge. At each level of competition the judge awards individual acting awards as well as selecting two productions to advance to the next level of competition. After the awards are announced the judge gives an oral critique to each of the schools. Because of the wide participation and diversity of plays produced, certain rules and guidelines have been adopted to ensure safety, allow for equity, satisfy legal standards, and make the running of the contest practical. These rules can be modified to achieve positive outcomes and improved educational results. Changes in the rules of a UIL contest are in accordance with stated educational objectives of the UIL. Occasionally, however, modifications in procedures raise questions. The problem of this study was to determine, from the perceptions of administrators and teachers, whether significant modifications in the rules and policies for the UIL One-Act Play Contest over a time span of 20 years have had impacts on the goals and procedures of the contest. The study utilized a qualitative approach through historical analysis and a survey to answer two research questions. Historical analysis identified the six modifications in the UIL OAP over the years 1986-2006. The survey instrument determined the impact of these changes on the goals and procedures of the contest. Based on the responses of the survey the competition experience has been enhanced by recent changes.
Date: May 2010
Creator: Stevens, David Todd
Partner: UNT Libraries

The Historical Development of Tertiary Education in the Bahamas: The College of the Bahamas, Past, Present, and Future.

Description: The purpose of this study was to provide a historical overview of the development of the College of the Bahamas, and to examine the development of the College of the Bahamas in light of the College of the Bahamas Act of 1974 and the subsequent Act of 1995. The research was qualitative in nature using historical analysis. The primary means of investigation were analyses of both primary and secondary documents and interviews with key individuals who were important to the development of the College of the Bahamas since the 1960s. The methods of triangulation of data and findings were complemented by member checks to affirm the basic findings of the study. The study was limited in scope to the College of the Bahamas to the exclusion of other tertiary institutions within the country. The College of the Bahamas has advanced greatly and has largely fulfilled the directives and goals of the Act of 1974 and is currently engaged in efforts to meet the goals of the Act of 1995.
Date: May 2010
Creator: Dames, Terren L.
Partner: UNT Libraries

Ida Gotkovsky's Eolienne Pour Flute et Harpe in Theory and Practice: A Critical Analysis

Description: This dissertation addresses specific theoretical issues within Gotkovsky's Eolienne. She was a student of Messiaen, and his influence is evident in Eolienne, but at the same time, Gotkovsky's compositional voice is both personally distinctive and reflects l'esprit de temps of the twentieth century Parisian musical world. The research provides extensive analytical insight into Gotkovsky's musical language in Eolienne, specifically her use of symmetrical scales, emphasis on timbre, and formal constructs. Because there are limited scholarly resources available on the subject of flute and harp chamber music, and a small amount of biographical information on Gotkovsky, this dissertation is a significant contribution within the area of chamber music for flute, both historically and theoretically. It provides an analysis of Gotkovsky's musical language and the analysis gives performers access to musical-theoretical information previously unavailable.
Date: May 2010
Creator: Surman, Patricia Jovanna
Partner: UNT Libraries

Identification of highly gifted 5- and 6-year-old children: Measures to predict academic achievement.

Description: Studies indicate the educational needs of highly gifted students are best met through accelerated learning. It is difficult to recognize very young children that are suited for an accelerated curriculum because younger students frequently lack school records or portfolios used to identify gifted students. This study examined the accuracy of cognitive ability and achievement tests in predicting academic achievement by the end of second grade, correlating test results and final grade averages collected from sixteen children ages five to six who entered a public school program for high-ability learners in kindergarten. A multiple regression analysis indicated the Wechsler Preschool and Primary Scale of Intelligence produced the highest mean IQ score and a strong correlation with reading achievement. The Wechsler Individual Achievement Test contributed in small part to the prediction of academic achievement. The Naglieri Nonverbal Ability Test and the Kaufman Brief Intelligence Test-Second Edition had negative correlations with final grade averages, indicating they are not predictors of academic achievement for these students.
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Date: May 2010
Creator: Runyon, Lisa
Partner: UNT Libraries

Incorporating Flow for a Comic [Book] Corrective of Rhetcon

Description: In this essay, I examined the significance of graphic novels as polyvalent texts that hold the potential for creating an aesthetic sense of flow for readers and consumers. In building a justification for the rhetorical examination of comic book culture, I looked at Kenneth Burke's critique of art under capitalism in order to explore the dimensions between comic book creation, distribution, consumption, and reaction from fandom. I also examined Victor Turner's theoretical scope of flow, as an aesthetic related to ritual, communitas, and the liminoid. I analyzed the graphic novels Green Lantern: Rebirth and Y: The Last Man as case studies toward the rhetorical significance of retroactive continuity and the somatic potential of comic books to serve as equipment for living. These conclusions lay groundwork for multiple directions of future research.
Date: May 2010
Creator: Castleberry, Garret
Partner: UNT Libraries

The Influence of Japanese Composers on the Development of the Repertoire for the Saxophone and the Significance of the Fuzzy Bird Sonata by Takashi Yoshimatsu

Description: The history of the saxophone and its development as a performance medium in Japan is short when compared with other European countries and the United States. In this short history, the saxophone performance level in Japan has increased dramatically. At the same time, compositions for the saxophone by Japanese composers have gained more popularity in the world as can be seen in the program of the World Saxophone Congress and the North American Saxophone Alliance conference. The saxophone history in Japan, including contributions of Arata Sakaguchi (1910-1997), Ryo Noda (b.1948), and Nobuya Sugawa (b.1961), is discussed in order to understand the increase of performances of pieces for saxophone by Japanese composers. The success of many original compositions, especially those that incorporate the synthesis of Eastern and Western music, is another significant element examined in this document. Yoshimatsu approaches music for classical saxophone as a new genre. He seeks all possible sounds that the saxophone can create - beautiful tone to "noise like" - in his compositions. The blending of other musical styles in one piece is one of Yoshimatsu's compositional styles, which can be observed in Fuzzy Bird Sonata; however, he does not limit himself to a single style. This unique style with some technical challenges attracts saxophonists and audiences. An analysis of Fuzzy Bird Sonata is provided in order to have a better understanding of the piece and to address performance practice issues. Also various interpretations are examined by comparing available recordings of Sugawa, Nicolas Prost, and Rob Buckland.
Date: May 2010
Creator: Hanafusa, Chiaki
Partner: UNT Libraries

Information Seeking Behavior of Crime Scene Investigators in the Turkish National Police

Description: This exploratory research is the first one among occupational information seeking behavior studies that focuses on information seeking behaviors of the crime scene investigators. The data used in this dissertation were gathered via a self-administrated survey instrument from 29 cities in Turkey. Findings obtained from the data analyses show that there is a strongly positive relationship between the experience of the crime scene investigators and the use of personal knowledge and experience as a primary information source (experience is operationalized with age, service years in policing, and service years in crime scene investigation units). The findings also suggest that increasing of the level of education is negatively related to relying on immediate colleagues as an information source among the crime scene investigators. These findings are consistent with related literature and theory. The data analysis shows that crime scene investigators work in cities with higher population rates have more complaint scores than those who work in cities with lower population rates across Turkey. The findings from the data analysis may suggest valuable implications to defeat the barriers between crime scene investigators and information sources. The researcher drew a proposed theoretical framework of an information behavior concept in the context of crime scene investigation that may help those who are interested in the phenomenon and its applications to other contexts.
Date: May 2010
Creator: Demircioglu, Mehmet
Partner: UNT Libraries

Instructional Leadership Responsibilities of Assistant Principals in Large Texas High Schools

Description: The purpose of this study was to determine the extent secondary assistant principals in large Texas high schools demonstrate behaviors consistent with what the literature describes as instructional leadership. Three hundred seventy principals and assistant principals of large Texas high schools participated in this study. The Principal Instructional Management Rating Scale (Hallinger, 1987) was used to quantify instructional leadership in 10 different job functions. The study found that (a) assistant principals perceive themselves as exhibiting instructional leadership behaviors at a high frequency, (b) principals perceive their assistant principals exhibiting instructional leadership behaviors at a high frequency, (c) the perceptions of the principals and assistant principals were similar, and (d) principals and assistant principals reported more engagement in instructional leadership responsibilities and felt more pressured over the last five years under the new accountability and rating requirements of No Child Left Behind and the state assessments. These findings suggested that the administrative roles and responsibilities in high schools should be restructured to allow assistant principals to focus on instructional leadership.
Date: May 2010
Creator: Howard-Schwind, Michelle
Partner: UNT Libraries